Abraham dyson



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Letters Patent No. 78,583, oZatecZ June 2, 1868.

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TO ALL WHOM IT MAYV' CONCERN: 4

Be it known that I, ABRAHAM DYSON, of St'. Louis, in the county of St. Louis, and State ofMissouri, have invented a new and useful Improved Street-Scraper, of which the following is a full, clear, and exact description, reference beinghad to the annexed drawing, makinga part ol' this specication, in which- Figure 1 represents a longitudinal sectional elevation of my invention, with the forward end broken oif. Figure 2 represents a transverse sectional-elevation of same at y z.

igure 3 represents a detached top view ofthe scraper-frame and scraper, the frame being in outline only. Similar letters indicate like parts. A

I mount a square wooden frame, A, figs. 1, 2, on three wheels, two, B B', at one end, B only being shown,

`and one in front, which is not shown. The wheel, B, is made fast to the axle, while its sister is loose, so that when the wheel B revolves, it carries thc axle with it; This frame is strengthened by three or more crosspieces, a a, fig. y1, a, g. 2, and on ci are .placed two n'prights, one of which, Zz, is .shown in fig. 1, and two others, c c,'f1g. 2, are placed on a, these uprightsforming the hearings for two shafts, one of which, cl, is seen in iig. 1, -and-d UZ', g. 2, and to these shafts are fixed four blocks, two on each, e elbeing shown in iig. 1, andl e e in iig. 2, e" not being shown. At the forward end of cach shaft is fastened a wheehf, g. 1, ff', fig. 2.

A triangular frame, D, ligs. 1, 2, 3, its base being equal to the length ofthe aXle of the wheels B B', has in its'side-pieces numerous -slots for the reception ofthe bars 9 10 1,1 12, iig. 1,12 16, iig. 2,*and 9 10 11 12 13 14 15 16, g. 3, which slide freely up and down in t'nenn, being prevented from dropping out by pins passing through their upper end, as shown. To the lower, end of' these bars are piroted Scrapers, 1 2 4, iig. 1, 4 8,

hg. 2, and 1 2 3 4 5 6 7 8, iig. 3, the other end of the scraper being free. These Scrapers arc made sufficiently heavy to bear with considerable force on the ground, and the free end of each iscurved so as to lap under or behind the back fixed end of its neighbor, as clearly shown in g. 3.

To the cross-piece g, gf3, at the apex of the frame D, is hinged a seniicircular metal fr anie E, iigs.l 1, 3,-

having beneath it, and firmly attached to it, as shown, a smaller frame, F, figs. 1, 3. Two circular Scrapers, Zt, iig. 1` L h', fig. 3, are attached to E, in' the manner already explained in relation to D.` The frame F being. made to come a. little below and outside of the upper edge of L h', as shown invig. 1. A cross-piece, k, figs. 1, 2, connects the sides of `the triangular frame D, at a short distancefrom its base.

To the blocks eef e e are attached elastic straps or bands ZZ Zl Z", ZZ being seen in Iig. 1, Z Z. in iig. 2, and'Z not shown at all, having their lower ends fastened to the scraper-frame D, which by them is hung beneath A, as seen in g. 1, the length of the bands being so adjusted as to allow-the sc'rapersto' rest on the ground. To prevent D from swingingtoo far to one side'orthe other, Yand alsoto prevent it from being forced back when the machine is in operation, a frame, H, gs. 1, 2, extends down from A, between the base of the triangle and the cross-piece k, and inside of the sides of thetriangle. A similar but srnaller frame is arranged at the other end of the triangle, just inside of g, but this is not shown. v

On the cross-piece a is erected a standard, L, figs.,1, 2, forming a bearing for the double-grooved wheel N, figs. 1,2, having a crank, w. N is connected by cords, :r :v,with the wheels f f', in such a manner, that when the crank is turned, ff revolve, and with them the shafts cZ oZ, which, winding up the bands Z Zl Zl Z on the blockse e e e'l, raise the Scrapers clear of the ground'. A catch, n, gs. 1, 2, attached by a. pin,lworking in a slot, to the standardm, while its other end passes through the plate o, extending'from a, and noving up and down on a spiral spring, as shown, is so' arranged, that when the crank is turned to wind up the scrapers, and has passed the catch, it springs up and prevents the crank from returning, one revolution of the crank being suilicient to raise the Scrapers.- Fig. 8 shows the crank when thus trigged. By pressing down the lever M, figs. 1, 2, pivoted to the standard L, thc catch is forced'down, releasingthe'cra-nk, and allowing the Scrapers to drop to the ground again.

A seat, G, is placed on the cross-piece a for the driver.-

To the upright, Z), is pivoted a lever, O, extending beyond the end of the frame A, whereit is connected by a'link, s, to E, first passing through the inverted U-iron, P- serving as a guide. Its other end passes beneath and curves up infront of the driver's seat, as eeen in g. 1. A curved arin, v, extends clown from O, a little below the axle ofthe hind wheels, in such amanncr that a cam, r, attached to the axle,may engage with it' as the axle revolves.

` The Scrapers resting on the ground, the horses Vare started, and all the refuse inside of the linefof the sides ofthe triangle is gathered up, and, by the action of 7L tcarried along till the cam r', engaging with the arm v,

raises the frame E, which, dropping as soon asthe cam and armdisengage, leaves the dirt 4collected in ahenp; i

but if it is desired to make a continuous line of scrapings, the driver, by depressing the lever O, may hold .the

-frame E up, vas long as necessary. v

The frame yIlbeingg; hung er1-elastic bands, and one'endof each scraper being free, ivlaile the other works freely up and down in slots of the frame D, as already deserhe'd,it' is evident that any nequality'of surface does not interfere with the scraping, and should a stone or any otherv obstruction be met by either ofthe l Scrapers, it canpass over or by it Without aifecting the other Scrapers, as each'w'orks entirely independently of the others. Should the'obstruction, however, be'met byh it only, they can'easily pass over it, for if-itstrikes oneit can rise,to pass over, withoutfaifeeting the other, since each works independently, and even it' it happens to be just` in the'v'eentre, they will still risevand pass over, instead of being'broken or carrying-the obstruction along with them, as would bel the e'ase were .they nnited and formed an unbrokenline. l Ifthe obstruction cannot, for any reason, be passed, the driver need only depressihis lever and raise the frame E. It is, therefore, f almost impossible for any part of the 'machine to be broken by obstructions that may be rnct, since,'by turning the crank M, the driver eau in amoment raise all the serapersfrom th'eground.

What I claim asmy' invention, and desire to "eeenre by 'Letters Patent, is-

1. 'lhewheelsffaud N, blocks c e e" elshafts d cl', and frame D, with their conneeting-oo1ds a: mi and elastic bands l l Z" Z of a street-scraping inach'ine, all arranged 'relatively to each other-andthe rest of the machine, substantially as and for the purpose shown and specified.

relatively to each other andthe'y remaining' partent the-machine, substantially as and for the-purpose shown and specified.

3, -The combination of'4 the; Scrapers 1 234, Ste., audit it', with :the frames D, E,'and F, 'all'constructed,

arranged, and operating substantially las and forthe purpose lshown Oand spleeied. l

v 4.,'A stretscrapingmachine, combining the devices above mentioned, Whenconstructed, arranged, and operating substantially as and for the purpose shown and specified, v

a.l DYSON.

Witnesses;

SAML lS. Bom),- J. GULDAC..

2. The -lever with its arm v, link s, frame D, and Learn r of a street-scrn-ping machine, all arranged 

